content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import static org.junit.Assert.assertNull;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.io.IOException;
  import java.util.*;
  
  import org.junit.*;
  import org.reactivestreams.*;
  
  import hu.akarnokd.reactivestreams.extensions.*;
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.TestException;
  import io.reactivex.common.functions.*;
  import io.reactivex.common.internal.functions.Functions;
  import io.reactivex.flowable.*;
  import io.reactivex.flowable.internal.subscriptions.BooleanSubscription;
  import io.reactivex.flowable.processors.*;
  import io.reactivex.flowable.subscribers.*;
  
  public class FlowableMapTest {
  
      Subscriber<String> stringSubscriber;
      Subscriber<String> stringSubscriber2;
  
      static final BiFunction<String, Integer, String> APPEND_INDEX = new BiFunction<String, Integer, String>() {
          @Override
          public String apply(String value, Integer index) {
              return value + index;
          }
      };
  
      @Before
      public void before() {
          stringSubscriber = TestHelper.mockSubscriber();
          stringSubscriber2 = TestHelper.mockSubscriber();
      }
  
      @Test
      public void testMap() {
          Map<String, String> m1 = getMap("One");
          Map<String, String> m2 = getMap("Two");
          Flowable<Map<String, String>> observable = Flowable.just(m1, m2);
  
          Flowable<String> m = observable.map(new Function<Map<String, String>, String>() {
              @Override
              public String apply(Map<String, String> map) {
                  return map.get("firstName");
              }
          });
  
          m.subscribe(stringSubscriber);
  
          verify(stringSubscriber, never()).onError(any(Throwable.class));
          verify(stringSubscriber, times(1)).onNext("OneFirst");
          verify(stringSubscriber, times(1)).onNext("TwoFirst");
          verify(stringSubscriber, times(1)).onComplete();
      }
  
      @Test
      public void testMapMany() {
          /* simulate a top-level async call which returns IDs */
          Flowable<Integer> ids = Flowable.just(1, 2);
  
          /* now simulate the behavior to take those IDs and perform nested async calls based on them */
          Flowable<String> m = ids.flatMap(new Function<Integer, Flowable<String>>() {
  
              @Override
              public Flowable<String> apply(Integer id) {
                  /* simulate making a nested async call which creates another Flowable */
                  Flowable<Map<String, String>> subFlowable = null;
                  if (id == 1) {
                      Map<String, String> m1 = getMap("One");
                      Map<String, String> m2 = getMap("Two");
                      subFlowable = Flowable.just(m1, m2);
                  } else {
                      Map<String, String> m3 = getMap("Three");
                      Map<String, String> m4 = getMap("Four");
                      subFlowable = Flowable.just(m3, m4);
                  }
  
                  /* simulate kicking off the async call and performing a select on it to transform the data */
                  return subFlowable.map(new Function<Map<String, String>, String>() {
                      @Override
                      public String apply(Map<String, String> map) {
                          return map.get("firstName");
                      }
                  });
              }
  
          });
          m.subscribe(stringSubscriber);
  
          verify(stringSubscriber, never()).onError(any(Throwable.class));
          verify(stringSubscriber, times(1)).onNext("OneFirst");
          verify(stringSubscriber, times(1)).onNext("TwoFirst");
          verify(stringSubscriber, times(1)).onNext("ThreeFirst");
          verify(stringSubscriber, times(1)).onNext("FourFirst");
          verify(stringSubscriber, times(1)).onComplete();
      }
  
      @Test
      public void testMapMany2() {
          Map<String, String> m1 = getMap("One");
          Map<String, String> m2 = getMap("Two");
          Flowable<Map<String, String>> observable1 = Flowable.just(m1, m2);
  
          Map<String, String> m3 = getMap("Three");
          Map<String, String> m4 = getMap("Four");
          Flowable<Map<String, String>> observable2 = Flowable.just(m3, m4);
  
          Flowable<Flowable<Map<String, String>>> observable = Flowable.just(observable1, observable2);
  
          Flowable<String> m = observable.flatMap(new Function<Flowable<Map<String, String>>, Flowable<String>>() {
  
              @Override
              public Flowable<String> apply(Flowable<Map<String, String>> o) {
                  return o.map(new Function<Map<String, String>, String>() {
  
                      @Override
                      public String apply(Map<String, String> map) {
                          return map.get("firstName");
                      }
                  });
              }
  
          });
          m.subscribe(stringSubscriber);
  
          verify(stringSubscriber, never()).onError(any(Throwable.class));
          verify(stringSubscriber, times(1)).onNext("OneFirst");
          verify(stringSubscriber, times(1)).onNext("TwoFirst");
          verify(stringSubscriber, times(1)).onNext("ThreeFirst");
          verify(stringSubscriber, times(1)).onNext("FourFirst");
          verify(stringSubscriber, times(1)).onComplete();
  
      }
  
      @Test
      public void testMapWithError() {
          Flowable<String> w = Flowable.just("one", "fail", "two", "three", "fail");
          Flowable<String> m = w.map(new Function<String, String>() {
              @Override
              public String apply(String s) {
                  if ("fail".equals(s)) {
                      throw new RuntimeException("Forced Failure");
                  }
                  return s;
              }
          }).doOnError(new Consumer<Throwable>() {
  
              @Override
              public void accept(Throwable t1) {
                  t1.printStackTrace();
              }
  
          });
  
          m.subscribe(stringSubscriber);
          verify(stringSubscriber, times(1)).onNext("one");
          verify(stringSubscriber, never()).onNext("two");
          verify(stringSubscriber, never()).onNext("three");
          verify(stringSubscriber, never()).onComplete();
          verify(stringSubscriber, times(1)).onError(any(Throwable.class));
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testMapWithIssue417() {
          Flowable.just(1).observeOn(Schedulers.computation())
                  .map(new Function<Integer, Integer>() {
                      @Override
                      public Integer apply(Integer arg0) {
                          throw new IllegalArgumentException("any error");
                      }
                  }).blockingSingle();
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testMapWithErrorInFuncAndThreadPoolScheduler() throws InterruptedException {
          // The error will throw in one of threads in the thread pool.
          // If map does not handle it, the error will disappear.
          // so map needs to handle the error by itself.
          Flowable<String> m = Flowable.just("one")
                  .observeOn(Schedulers.computation())
                  .map(new Function<String, String>() {
                      @Override
                      public String apply(String arg0) {
                          throw new IllegalArgumentException("any error");
                      }
                  });
  
          // block for response, expecting exception thrown
          m.blockingLast();
      }
  
      /**
       * While mapping over range(1,0).last() we expect NoSuchElementException since the sequence is empty.
       */
      @Test
      public void testErrorPassesThruMap() {
          assertNull(Flowable.range(1, 0).lastElement().map(new Function<Integer, Integer>() {
  
              @Override
              public Integer apply(Integer i) {
                  return i;
              }
  
          }).blockingLast(null));
      }
  
      /**
       * We expect IllegalStateException to pass thru map.
       */
      @Test(expected = IllegalStateException.class)
      public void testErrorPassesThruMap2() {
          Flowable.error(new IllegalStateException()).map(new Function<Object, Object>() {
  
              @Override
              public Object apply(Object i) {
                  return i;
              }
  
          }).blockingSingle();
      }
  
      /**
       * We expect an ArithmeticException exception here because last() emits a single value
       * but then we divide by 0.
       */
      @Test(expected = ArithmeticException.class)
      public void testMapWithErrorInFunc() {
          Flowable.range(1, 1).lastElement().map(new Function<Integer, Integer>() {
  
              @Override
              public Integer apply(Integer i) {
                  return i / 0;
              }
  
          }).blockingLast();
      }
  
      // FIXME RS subscribers can't throw
  //    @Test(expected = OnErrorNotImplementedException.class)
  //    public void verifyExceptionIsThrownIfThereIsNoExceptionHandler() {
  //
  //        Publisher<Object> creator = new Publisher<Object>() {
  //
  //            @Override
  //            public void subscribe(Subscriber<? super Object> observer) {
  //                observer.onSubscribe(EmptySubscription.INSTANCE);
  //                observer.onNext("a");
  //                observer.onNext("b");
  //                observer.onNext("c");
  //                observer.onComplete();
  //            }
  //        };
  //
  //        Function<Object, Flowable<Object>> manyMapper = new Function<Object, Flowable<Object>>() {
  //
  //            @Override
  //            public Flowable<Object> apply(Object object) {
  //                return Flowable.just(object);
  //            }
  //        };
  //
  //        Function<Object, Object> mapper = new Function<Object, Object>() {
  //            private int count = 0;
  //
  //            @Override
  //            public Object apply(Object object) {
  //                ++count;
  //                if (count > 2) {
  //                    throw new RuntimeException();
  //                }
  //                return object;
  //            }
  //        };
  //
  //        Consumer<Object> onNext = new Consumer<Object>() {
  //
  //            @Override
  //            public void accept(Object object) {
  //                System.out.println(object.toString());
  //            }
  //        };
  //
  //        try {
  //            Flowable.create(creator).flatMap(manyMapper).map(mapper).subscribe(onNext);
  //        } catch (RuntimeException e) {
  //            e.printStackTrace();
  //            throw e;
  //        }
  //    }
  
      private static Map<String, String> getMap(String prefix) {
          Map<String, String> m = new HashMap<String, String>();
          m.put("firstName", prefix + "First");
          m.put("lastName", prefix + "Last");
          return m;
      }
  
      @Test//(expected = OnErrorNotImplementedException.class)
      @Ignore("RS subscribers can't throw")
      public void testShouldNotSwallowOnErrorNotImplementedException() {
  //        Flowable.just("a", "b").flatMap(new Function<String, Flowable<String>>() {
  //            @Override
  //            public Flowable<String> apply(String s) {
  //                return Flowable.just(s + "1", s + "2");
  //            }
  //        }).flatMap(new Function<String, Flowable<String>>() {
  //            @Override
  //            public Flowable<String> apply(String s) {
  //                return Flowable.error(new Exception("test"));
  //            }
  //        }).forEach(new Consumer<String>() {
  //            @Override
  //            public void accept(String s) {
  //                System.out.println(s);
  //            }
  //        });
      }
  
      @Test//(expected = OnErrorNotImplementedException.class)
      @Ignore("RS subscribers can't throw")
      public void verifyExceptionIsThrownIfThereIsNoExceptionHandler() {
  //
  //        Flowable.OnSubscribe<Object> creator = new Flowable.OnSubscribe<Object>() {
  //
  //            @Override
  //            public void call(Subscriber<? super Object> observer) {
  //                observer.onNext("a");
  //                observer.onNext("b");
  //                observer.onNext("c");
  //                observer.onComplete();
  //            }
  //        };
  //
  //        Func1<Object, Flowable<Object>> manyMapper = new Func1<Object, Flowable<Object>>() {
  //
  //            @Override
  //            public Flowable<Object> call(Object object) {
  //                return Flowable.just(object);
  //            }
  //        };
  //
  //        Func1<Object, Object> mapper = new Func1<Object, Object>() {
  //            private int count = 0;
  //
  //            @Override
  //            public Object call(Object object) {
  //                ++count;
  //                if (count > 2) {
  //                    throw new RuntimeException();
  //                }
  //                return object;
  //            }
  //        };
  //
  //        Consumer<Object> onNext = new Consumer<Object>() {
  //
  //            @Override
  //            public void accept(Object object) {
  //                System.out.println(object.toString());
  //            }
  //        };
  //
  //        try {
  //            Flowable.create(creator).flatMap(manyMapper).map(mapper).subscribe(onNext);
  //        } catch (RuntimeException e) {
  //            e.printStackTrace();
  //            throw e;
  //        }
      }
  
      @Test
      public void functionCrashUnsubscribes() {
  
          PublishProcessor<Integer> ps = PublishProcessor.create();
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          ps.map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) {
                  throw new TestException();
              }
          }).subscribe(ts);
  
          Assert.assertTrue("Not subscribed?", ps.hasSubscribers());
  
          ps.onNext(1);
  
          Assert.assertFalse("Subscribed?", ps.hasSubscribers());
  
          ts.assertError(TestException.class);
      }
  
      @Test
      public void mapFilter() {
          Flowable.range(1, 2)
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  return v + 1;
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .test()
          .assertResult(2, 3);
      }
  
      @Test
      public void mapFilterMapperCrash() {
          Flowable.range(1, 2)
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  throw new TestException();
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void mapFilterHidden() {
          Flowable.range(1, 2).hide()
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  return v + 1;
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .test()
          .assertResult(2, 3);
      }
  
      @Test
      public void mapFilterFused() {
          TestSubscriber<Integer> ts = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          Flowable.range(1, 2)
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  return v + 1;
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .subscribe(ts);
  
          ts.assertOf(SubscriberFusion.<Integer>assertFuseable())
          .assertOf(SubscriberFusion.<Integer>assertFusionMode(FusedQueueSubscription.SYNC))
          .assertResult(2, 3);
      }
  
      @Test
      public void mapFilterFusedHidden() {
          TestSubscriber<Integer> ts = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          Flowable.range(1, 2).hide()
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  return v + 1;
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .subscribe(ts);
  
          ts.assertOf(SubscriberFusion.<Integer>assertFuseable())
          .assertOf(SubscriberFusion.<Integer>assertFusionMode(FusedQueueSubscription.NONE))
          .assertResult(2, 3);
      }
  
      @Test
      public void sourceIgnoresCancel() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
  
          try {
              Flowable.fromPublisher(new Publisher<Integer>() {
                  @Override
                  public void subscribe(Subscriber<? super Integer> s) {
                      s.onSubscribe(new BooleanSubscription());
                      s.onNext(1);
                      s.onNext(2);
                      s.onError(new IOException());
                      s.onComplete();
                  }
              })
              .map(new Function<Integer, Object>() {
                  @Override
                  public Object apply(Integer v) throws Exception {
                      throw new TestException();
                  }
              })
              .test()
              .assertFailure(TestException.class);
  
              TestCommonHelper.assertUndeliverable(errors, 0, IOException.class);
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void mapFilterMapperCrashFused() {
          TestSubscriber<Integer> ts = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          Flowable.range(1, 2).hide()
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  throw new TestException();
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .subscribe(ts);
  
          ts.assertOf(SubscriberFusion.<Integer>assertFuseable())
          .assertOf(SubscriberFusion.<Integer>assertFusionMode(FusedQueueSubscription.NONE))
          .assertFailure(TestException.class);
      }
  
      @Test
      public void sourceIgnoresCancelFilter() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
  
          try {
              Flowable.fromPublisher(new Publisher<Integer>() {
                  @Override
                  public void subscribe(Subscriber<? super Integer> s) {
                      s.onSubscribe(new BooleanSubscription());
                      s.onNext(1);
                      s.onNext(2);
                      s.onError(new IOException());
                      s.onComplete();
                  }
              })
              .map(new Function<Integer, Integer>() {
                  @Override
                  public Integer apply(Integer v) throws Exception {
                      throw new TestException();
                  }
              })
              .filter(new Predicate<Integer>() {
                  @Override
                  public boolean test(Integer v) throws Exception {
                      return true;
                  }
              })
             .test()
              .assertFailure(TestException.class);
  
              TestCommonHelper.assertUndeliverable(errors, 0, IOException.class);
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void mapFilterFused2() {
          TestSubscriber<Integer> ts = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          UnicastProcessor<Integer> up = UnicastProcessor.create();
  
          up
          .map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer v) throws Exception {
                  return v + 1;
              }
          })
          .filter(new Predicate<Integer>() {
              @Override
              public boolean test(Integer v) throws Exception {
                  return true;
              }
          })
          .subscribe(ts);
  
          up.onNext(1);
          up.onNext(2);
          up.onComplete();
  
          ts.assertOf(SubscriberFusion.<Integer>assertFuseable())
          .assertOf(SubscriberFusion.<Integer>assertFusionMode(FusedQueueSubscription.ASYNC))
          .assertResult(2, 3);
      }
  
      @Test
      public void sourceIgnoresCancelConditional() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
  
          try {
              Flowable.fromPublisher(new Publisher<Integer>() {
                  @Override
                  public void subscribe(Subscriber<? super Integer> s) {
                      ConditionalSubscriber<? super Integer> cs = (ConditionalSubscriber<? super Integer>)s;
                      cs.onSubscribe(new BooleanSubscription());
                      cs.tryOnNext(1);
                      cs.tryOnNext(2);
                      cs.onError(new IOException());
                      cs.onComplete();
                  }
              })
              .map(new Function<Integer, Integer>() {
                  @Override
                  public Integer apply(Integer v) throws Exception {
                      throw new TestException();
                  }
              })
              .filter(new Predicate<Integer>() {
                  @Override
                  public boolean test(Integer v) throws Exception {
                      return true;
                  }
              })
              .test()
              .assertFailure(TestException.class);
  
              TestCommonHelper.assertUndeliverable(errors, 0, IOException.class);
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Flowable.range(1, 5).map(Functions.identity()));
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowable(new Function<Flowable<Object>, Flowable<Object>>() {
              @Override
              public Flowable<Object> apply(Flowable<Object> o) throws Exception {
                  return o.map(Functions.identity());
              }
          });
      }
  
      @Test
      public void fusedSync() {
          TestSubscriber<Integer> to = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          Flowable.range(1, 5)
          .map(Functions.<Integer>identity())
          .subscribe(to);
  
          SubscriberFusion.assertFusion(to, FusedQueueSubscription.SYNC)
          .assertResult(1, 2, 3, 4, 5);
      }
  
      @Test
      public void fusedAsync() {
          TestSubscriber<Integer> to = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          UnicastProcessor<Integer> us = UnicastProcessor.create();
  
          us
          .map(Functions.<Integer>identity())
          .subscribe(to);
  
          TestHelper.emit(us, 1, 2, 3, 4, 5);
  
          SubscriberFusion.assertFusion(to, FusedQueueSubscription.ASYNC)
          .assertResult(1, 2, 3, 4, 5);
      }
  
      @Test
      public void fusedReject() {
          TestSubscriber<Integer> to = SubscriberFusion.newTest(FusedQueueSubscription.ANY | FusedQueueSubscription.BOUNDARY);
  
          Flowable.range(1, 5)
          .map(Functions.<Integer>identity())
          .subscribe(to);
  
          SubscriberFusion.assertFusion(to, FusedQueueSubscription.NONE)
          .assertResult(1, 2, 3, 4, 5);
      }
  
      @Test
      public void badSource() {
          TestHelper.checkBadSourceFlowable(new Function<Flowable<Object>, Object>() {
              @Override
              public Object apply(Flowable<Object> o) throws Exception {
                  return o.map(Functions.identity());
              }
          }, false, 1, 1, 1);
      }
  
  }
  